Triple Bean Balance Essays - Laboratory Equipment,

Triple Bean Balance TRIPLE BEAM BALANCE The triple beam balance is a rugged, inexpensive weighing instrument. It is named for the three beams which carry weights.A. The middle beam reads only in 100 g increments.B. The far beam reads only in 10 g increments.The weights in each of these must always sit in a notch. They cannot be placed at arbitrary points on the beam.C. The weight on the front beam can be placed to read continuously from 0 to 10 grams. The Triple Beam Balance is a typical mechanical balance.It has a beam which is supported by a fulcrum. On one side is a pan on which the object is placed. On the other side, the beam is split into three parallel beams , each supporting one weight. In measuring the weight of an object, rather than adding additional weights, each of the three weights can be slid along the beam to increase their lever arm.It works just like a tetter-totter. If you have two people of unequal weight, the heavier person sits closer to the fulcrum to decrease their lever arm. Making a WeighingIn measuring the mass of any material ,you must always make............................................. two weighings!If you use a container to hold the material, you must first weigh the empty container. This weight is called the tare of the container. Then you weigh the container with the material in it. The difference between these two weighings is the mass of the material.In weighing an object directly on the pan, you must still make two weighings. The first of these is to weigh the empty pan! This must be set to read 0.00 g. The triple beam balance has a little knob under the pan which you screw in or out to set the empty balance to read exactly 0.00 g.So, in weighing an object directly on the pan, you must first Zero the balance. Only if the balance is properly zeroed, will it weigh the object correctly. The front beam is graduated in one gram units 0-10 (see numbers). Each one gram interval is further divided into 10 spaces or .1 gram. When the weight is carefully placed, its position can be estimated to .01 or .02 g.In reading any graduated scale....You read not only to the smallest graduation mark but estimate between the graduation marks.This is called reading the scale to the proper number of Sig Figs. Science

Geography of the Countries of Africa

Geography of the Countries of Africa The continent of Africa is the worlds second-largest based on land area and population just after Asia. It has a population of around one billion people (as of 2009) and covers 20.4% of the Earths land area. Africa is bordered by the  Mediterranean Sea to the north, the Red Sea and the Suez Canal to the northeast, the Indian Ocean to the southeast and the Atlantic Ocean to the west.Africa is known for its biodiversity, varied topography, culture, and varied climate. The continent straddles the equator and encompasses the entire tropical band. Africas northern and southernmost countries also stretch out of the tropics (from 0 ° to 23.5 ° N and S latitude) and into the northern and southern temperate latitudes (latitudes above the Tropics of Cancer and Capricorn).As the worlds second-largest continent, Africa is divided into 53 officially recognized countries. The following is a list of Africas countries ordered by land area. For reference, the countrys population and capital cit y have also been included. 1) SudanArea: 967,500 square miles (2,505,813 sq km)Population: 39,154,490Capital: Khartoum2) AlgeriaArea: 919,594 square miles (2,381,740 sq km)Population: 33,333,216Capital: Algiers3) Democratic Republic of the CongoArea: 905,355 square miles (2,344,858 sq km)Population: 63,655,000Capital: Kinshasa4) LibyaArea: 679,362 square miles (1,759,540 sq km)Population: 6,036,914Capital: Tripoli5) ChadArea: 495,755 square miles (1,284,000 sq km)Population: 10,146,000Capital: NDjamena6) NigerArea: 489,191 square miles (1,267,000 sq km)Population: 13,957,000Capital: Niamey7) AngolaArea: 481,353 square miles (1,246,700 sq km)Population: 15,941,000Capital: Luanda8) MaliArea: 478,840 square miles (1,240,192 sq km)Population: 13,518,000Capital: Bamako9) South AfricaArea: 471,455 square miles (1,221,037 sq km)Population: 47,432,000Capital: Pretoria10) EthiopiaArea: 426,372 square miles (1,104,300 sq km)Population: 85,237,338Capital: Addis Ababa11) MauritaniaArea: 396,955 square miles (1,030,700 sq km)Population: 3,069,000Capital: Nouakchott12) EgyptArea: 386,661 square miles (1,001,449 sq km)Population: 80,335,036Capital: Cairo13) TanzaniaArea: 364,900 square miles (945,087 sq km)Population: 37,849,133Capital: Dodoma14) NigeriaArea: 356,668 square miles (923,768 sq km)Population: 154,729,000Capital: Abuja15) NamibiaArea: 318,695 square miles (825,418 sq km)Population: 2,031,000Capital: Windhoek16) MozambiqueArea: 309,495 square miles (801,590 sq km)Population: 20,366,795Capital: Maputo17) ZambiaArea: 290,585 square miles (752,614 sq km)Population: 14,668,000Capital: Lusaka18) SomaliaArea: 246,200 square miles (637,657 sq km)Population: 9,832,017Capital: Mogadishu19) Central African RepublicArea: 240,535 square miles (622,984 sq km)Population: 4,216,666Capital: Bangui20) MadagascarArea: 226,658 square miles (587,041 sq km)Population: 18,606,000Capital: Antananarivo21) BotswanaArea: 224,340 square miles (581,041 sq km)Population: 1,839,833Capital: Gaborone22) KenyaArea: 224,080 square miles (580,367 sq km)Population: 34,707,817Capital: Nairobi23) CameroonArea: 183,569 square miles (475,442 sq km)Population: 17,795,000Capital: Yaoundà ©24) MoroccoArea: 172,414 square miles (446,550 sq km)Population: 33,757,175Capital: Rabat25) ZimbabweArea: 150,872 square miles (390,757 sq km)Population: 13,010,000Capital: Harare 26) Republic of the CongoArea: 132,046 square miles (342,000 sq km)Population: 4,012,809Capital: Brazzaville27) Cà ´te dIvoireArea: 124,502 square miles (322,460 sq km)Population: 17,654,843Capital: Yamoussoukro28) Burkina FasoArea: 105,792 square miles (274,000 sq km)Population: 13,228,000Capital: Ouagadougou29) GabonArea: 103,347 square miles (267,668 sq km)Population, 1,387,000Capital: Libreville30) GuineaArea: 94,925 square miles (245,857 sq km)Population: 9,402,000Capital: Conakry31)  GhanaArea: 92,098 square miles (238,534 sq km)Population: 23,000,000Capital: Accra32) UgandaArea: 91,135 square miles (236,040 sq km)Population: 27,616,000Capital: Kampala33) SenegalArea: 75,955 square miles (196,723 sq km)Population: 11,658,000Capital: Dakar34) TunisiaArea: 63,170 square miles (163,610 sq km)Population: 10,102,000Capital: Tunis35) MalawiArea: 45,746 square miles (118,484 sq km)Population: 12,884,000Capital: Lilongwe36) EritreaArea: 45,405 square miles (117,600 sq km)Population: 4,401,000Capital: Asmara37) BeninArea: 43,484 square miles (112,622 sq km)Population: 8,439,000Capital: Porto Novo38) LiberiaArea: 43,000 square miles (111,369 sq km)Population: 3,283,000Capital: Monrovia39) Sierra LeoneArea: 27,699 square miles (71,740 sq km)Population: 6,144,562Capital: Freetown40) TogoArea: 21,925 square miles (56,785 sq km)Population: 6,100,000Capital: Lomà ©41) Guinea-BissauArea: 13,948 square miles (36,125 sq km)Population: 1,586,000Capital: Bissau42) LesothoArea: 11,720 square miles (30,355 sq km)Population: 1,795,000Capital: Maseru43) Equatorial GuineaArea: 10,830 square miles (28,051 sq km)Population: 504,000Capital: Malabo44) BurundiArea: 10,745 square miles (27,830 sq km)Population: 7,548,000Capital: Gitega (changed from Bujumbura in December 2018)45) RwandaArea: 10,346 square miles (26,798 sq km)Population: 7,600,000Capital: Kigali46) DjiboutiArea: 8,957 square miles (23,200 sq km)Population: 496,374Capital: Djibouti47) SwazilandArea: 6,704 square mile s (17,364 sq km)Population: 1,032,000Capital: Lobamba and Mbabane48) GambiaArea: 4,007 square miles (10,380 sq km)Population: 1,517,000Capital: Banjul49) Cape VerdeArea: 1,557 square miles (4,033 sq km)Population: 420,979Capital: Praia50) ComorosArea: 863 square miles (2,235 sq km)Population: 798,000Capital: Moroni51) MauritiusArea: 787 square miles (2,040 sq km)Population: 1,219,220Capital: Port Louis52) So Tomà © and Prà ­ncipeArea: 380 square miles (984 sq km)Population: 157,000Capital: So Tomà ©53) SeychellesArea: 175 square miles (455 sq km)Population: 88,340Capital: Victoria References Wikipedia. (2010, June 8).  Africa- Wikipedia, the Free Encyclopedia. Retrieved from:  http://en.wikipedia.org/wiki/Africa Wikipedia. (2010, June 12).  List of African Countries and Territories- Wikipedia, the Free Encyclopedia. Retrieved from:  http://en.wikipedia.org/wiki/List_of_African_countries_and_territories

Eastern North American Neolithic

Eastern North American Neolithic Archaeological evidence shows that eastern North America (often abbreviated ENA) was a separate place of origin for the invention of agriculture. The earliest evidence of low-level food production in ENA begins between about 4000 and 3500 years ago, during the period known as the Late Archaic. People entering the Americas brought with them two domesticates: the dog and the bottle gourd. Domestication of new plants in ENA began with the squash Cucurbita pepo ssp. ovifera, domesticated ~4000 years ago by Archaic hunter-gatherer-fishers, probably for its use (like the bottle gourd) as a container and fishnet float. Seeds of this squash are edible, but the rind is quite bitter. Read more about Cucurbita pepoRead more about the American Archaic Food Crops in Eastern North America The first food crops domesticated by the Archaic hunter-gatherers were oily and starchy seeds, most of which are considered weeds today. Iva annua (known as marshelder or sumpweed) and Helianthus annuus (sunflower) were domesticated in ENA by about 3500 years ago, for their oil-rich seeds. Read more about sunflower domestication Chenopodium berlandieri (chenopod or goosefoot) is reckoned to have been domesticated in Eastern North America by ~3000 BP, based on its thinner seed coats. By 2000 years ago, Polygonum erectum (knotweed), Phalaris caroliniana (maygrass), and Hordeum pusillum (little barley), Amaranthus hypochondriacus (pigweed or amaranth) and perhaps Ambrosia trifida (giant ragweed), were likely cultivated by Archaic hunter-gatherers; but scholars are somewhat divided as to whether they were domesticated or not. Wild rice (Zizania palustris) and Jerusalem artichoke (Helianthus tuberosus) were exploited but apparently not domsticated prehistorically. Read more about chenopodium Cultivating Seed Plants Archaeologists believe that seed plants may have been cultivated by collecting the seeds and using the maslin technique, that is to say, by storing the seeds and mixing them together before broadcasting them onto a suitable patch of ground, such as a floodplain terrace. Maygrass and little barley ripen in spring; chenopodium and knotweed ripen in fall. By mixing these seeds together and sprinkling them on fertile ground, the farmer would have a patch where seeds could reliably be harvested for three seasons. The domestication would have occurred when the cultivators began selecting the chenopodium seeds with the thinnest seed covers to save and replant. By the Middle Woodland period, domesticated crops such as maize (Zea mays) (~800-900 AD) and beans (Phaseolus vulgaris) (~1200 AD) arrived in ENA from their central American homelands  and were integrated into what archaeologists have termed the Eastern Agricultural Complex. These crops would have been planted in large separate fields or intercropped, as part of the three sisters or mixed cropping agricultural technique. Read more about maizeRead more about the Three SistersRead more about the ​Eastern Agricultural Complex Important ENA Archaeological Sites Kentucky: Newt Kash, Cloudsplitter, Salts CaveAlabama: Russell CaveIllinois: Riverton, American Bottom sitesMissouri: Gypsy JointOhio: Ash CaveArkansas: Edens Bluff, Whitney Bluff, Holman ShelterMississippi: Natchez Sources Fritz GJ. 1984. Identification of Cultigen Amaranth and Chenopod from Rockshelter Sites in Northwest Arkansas. American Antiquity 49(3):558-572. Fritz, Gayle J. Multiple pathways to farming in precontact eastern North America. Journal of World Prehistory, Volume 4, Issue 4, December 1990. Gremillion KJ. 2004. Seed Processing and the Origins of Food Production in Eastern North America. American Antiquity 69(2):215-234. Pickersgill B. 2007. Domestication of Plants in the Americas: Insights from Mendelian and Molecular Genetics. Annals of Botany 100(5):925-940. Open Access. Price TD. 2009. Ancient farming in eastern North America. Proceedings of the National Academy of Sciences 106(16):6427-6428. Scarry, C. Margaret. Crop Husbandry Practices in North America’s Eastern Woodlands. Case Studies in Environmental Archaeology, SpringerLink. Smith BD. 2007. Niche construction and the behavioral context of plant and animal domestication. Evolutionary Anthropology: Issues, News, and Reviews 16(5):188-199. Smith BD, and Yarnell RA. 2009. Initial formation of an indigenous crop complex in eastern North America at 3800 B.P. Proceedings of the National Academy of Sciences 106(16):561–6566.

The Impact of social Networking on Customer Loyalty Thesis

The Impact of social Networking on Customer Loyalty - Thesis Example This essay stresses that Facebook is one of the widely use social networking websites around the world. The number of users of social media is increasing with the passage of time however youngsters are more inclined towards using of social media than people of other ages. Moreover most of the people are logging their accounts on a daily basis and thus, it has encouraged businesses to use social media to convey their marketing messages as well. Social media websites are used for different purposes, one of them is that people do research and gather information about the products and services. Social Networking Sites are a very important part of Web 2.0. SNSs have become a powerful force in shaping public opinions on virtually every aspect of commerce. SNS imply word-of-mouth marketing, and have an increasing influence on customers’ purchase decisions and in turn affects customer loyalty. The study of this topic has been really interesting due to the image that the social media portray in the society. Although there was not so much time and mean I managed to have convenient samples for a small case study, which is thus a hindrance to generalize the result of the finding. However convenient sample could provide springboard for further research. The work could have been easier if only the questionnaire has been done based on the theory chapter. Due to some misunderstanding some theories were not letter consider as to be one hence some theories has to be included latter. So the challenge was to make sure that the new.

Landscape and map Essay Example | Topics and Well Written Essays - 500 words

Landscape and map - Essay Example It does not display all the details of objects on the ground, it only shows and outlines of such objects. They both give information of a particular area (Meinig 33-48). A landscape and map are similar in that they display a representation, or rather they are both presented on a piece of paper or board, they are both visual representation (Berger 7-11). They are used to summarize information for easy and quick reference. Moreover, maps and the landscapes might be used by planners to plan specific areas properly. Maps and landscapes are different in that the maps are used and made for different purposes unlike the landscape which their purpose is to represent visible features of an area or land (Kaplan & White 69). A map generally displays only those geographies required for a specific location. Additionally, maps show much information unlike the landscape that shows only the details of the restricted area. Travellers use maps to find their way whereas a landscape gives the travellers the overview on an area. Maps can calculate the distance from one place to another while as the landscapes only shows the general view. Maps are used to locate places on the earth surface. Maps also can be used to compare the sizes and the shapes of different lands and water masses. The maps provide detailed information about an area while as a landscape just hints on the background (Tyner 6). However, a landscape helps improve the aesthetic appearance of the field by planting shrubs or trees, changing the land s contours or adding ornamental features. A landscape process can be defined as a process that occurs in a spatial domain (p. 69). The landscape process is primarily propagated across the land surface. It not only serves to structure but also, it is influenced by the spatial structure of the ecosystems; and whose impact on the spatial pattern is dependent to a degree upon the landscape structure is either greater or lesser (Kaplan & White

Louis Armstrong Essay -- Jazz Player Music Musician Biography Essays

Louis Armstrong Heroes are needed in the world to give people something to look up to, someone to be like. Louis Armstrong over came such adversities as poverty, a lack of good education, and racism to become one of the greatest jazz player not just of the 1920s but of the 20th century. Armstrong was one of the creators of Jazz and was one of the most popular entertainers from the 1920s. Starting out at a young age he never knew that one day he would be such a popular jazz player and also not knowing that one day he might even be called a hero. Armstrong was born on July 4, 1900 in the Storyville section of New Orleans. At the age of 12 his life changed. When he was parting for New Years Eve, he shot a gun into the air. He was soon arrested and taken to a center for juvenile offenders. He hated being there, but loved going to see the band at the center play everyday. When he got the chance to go play in the band, he quickly did. He first started out playing the Alto Horn then moved to the drums and finally ending up with the trumpet. Two years later at the age of fourteen he was released from the center. He went out and got jobs to help get him to be able to afford an instrument. His jobs included, selling papers, unloading boats, and selling coal from a cart. On his off times he would go around to clubs like the Funky Butt Hall to listen to bands play. A jazz musician named King Oliver saw him and was impressed at his attendance at so many of the local clubs that he inquired of him as to if he wanted to learn to play the cornet. Armstrong said yes. He picked it up very quickly and soon was playing in bands for people that were absent. This soon lead to him starting his own band. This was all at the age of seventeen. Armstrong played with his band, known as Louis Armstrong Hot 5 or Hot 7, for two years and then King Oliver went to Chicago. Armstrong took a spot in Kid Ory’s orchestra one of the biggest known bands in the town. He played on the riverboats on the Mississippi River and got better at playing. All this without even knowing how to read music. While on the riverboat he was taught to read music which would help him out greatly later, when he became a band conductor. In 1922 he was called to Chicago by King Oliver. After arriving he made a change t... ... modern classical music. Contemporary classical composers like Darius Milhaud and Igor Stravinsky emulated much of Armstrong's work. In addition, Armstrong left his mark on other aspects of American culture as his fascinating personality truly influenced a nation. Armstrong's legacy can be traced into "dance, theater, the visual arts, fashion, poetry, and literature." Nobody has done more for jazz than Louis Armstrong. His contributions, influence, and legacy are immeasurable. Louis Armstrong truly is the jazz legend. As fellow trumpeter Dizzy Gillespie points out, "If it weren't for him, there wouldn't be any of us." When there is someone who beats all the odds to come out on top and shows you that you can do anything if you really want to. You probably will call them a hero. Hero doesn’t just mean saving lives and helping people that are in danger of dying, it can also be someone who makes you believe that you can do anything that you can imagine. Louie Armstrong helped lots of black people know that just because of their color, it didn’t mean that they couldn’t be one of the most famous people in the world.

Educational Problems in Egypt Essay

Egypt has the most significant educational system in the (MENA); Middle East and North Africa according to the Human Development Index (HDI). Although the educational system had been developing hastily since the beginning of the 1990s, Egypt had been continuously facing serious and accumulated problems in education. An exploding population, an increasing poverty, low literacy rates, drastic injustice in schools qualities; schools in urban areas where the rich can pay for education are better than other schools in different areas, Low teaching salaries and inconsistent funding for the educational system by the government, all led to a decreasing educational quality mainly in the most essential and indispensable part of the educational system which is basic education, also it led many teachers to the road of private tutoring for extra income. Moreover, memorization rather than critical thinking was unwillingly encouraged through physical punishment in schools and homes. For countless Egyptian children fragmented information was the result and that was never considered real knowledge. Yet again as a product of these causes, more and more escalating numbers of graduates are found unemployed. Egypt will continue to face an educational crisis, as lack of well trained teachers, effective schools and developed educational equipment unless a much better financial commitment is made by the government. This essay will first demonstrate the main causes of the educational problem, examine the effects of these problems on the society, discuss and analyze the previously proposed solutions and finally enlighten a solution that will most likely work in our Egyptian society.